package com.example.demo.common;

import org.springframework.util.StringUtils;

public class StringTools {
    public static String subLength(String val, int length) {
        if (!StringUtils.hasLength(val) || length <= 0) {
            return val;
        }

        if (val.length() <= length) {
            return val;
        }
        return val.substring(0, length);
    }
}
